Lectrosonics AM16/12 Operating Instructions Manual page 15

16 Channel Automatic Matrix Mixer
Matrix Setup Tab
The Input/Output Matrix tab sets
the input to output assignments
for the AM16/12.
Input/Output Crosspoint ­
Allows the input/output
crosspoint gain to be set. Each
of the 12 rows of 18 crosspoint
boxes represent input connec­
tions which may be set from
inputs to outputs 1-12. To set a
crosspoint
gain, simply
click on the
crosspoint box
at the inter­
section of the
desired input
and desired
output. The
crosspoint box
will turn
yellow, and
you'll see the
following
selection box
pop up:
At this point, the current crosspoint gain is highlighted in the selection box. Choose a new gain by clicking on the
desired crosspoint gain value. If you decide not to change the crosspoint gain, you may press the Esc key or click on
the crosspoint box again to close the selection box without changing the crosspoint gain. The first 16 crosspoint
boxes in each output row are for the AM16/12 inputs. Two other signals are available to be included in the output
mixes: Exp In and Noise.
Exp In is the signal from the 8 pin mini-DIN LecNet Expansion In connector on the rear panel of the AM16/12. This
signal would be used if another LecNet device, like a TH3A Telephone Hybrid, were connected to the AM16/12 via
the expansion cable. In this case, the TH3A's receive signal would be present at the Exp In connector. The
crosspoint gains for Exp In to any active outputs would be set to the desired gain so that the participants in the local
room could hear the far-end participant. Another application might be the addition of 8 more inputs using an AM8. In
this case, the sum of all 8 AM8 channels would appear at the Exp In connector. This signal could then be distributed
as necessary to appropriate output mixes.
The AM16/12 includes an internal broadband noise generator which can be included into any of the output mixes.
One application for the noise generator is bench conferences in courtrooms. During a bench conference, noise is
output over the sound system in the jury box, the gallery, and any other place that shouldn't hear the conversation at
the bench.
Short Cuts:
A right mouse click on a crosspoint gain box will set the crosspoint gain to 0dB. A middle mouse click
(for those with a three button mouse) will set the crosspoint gain to "Off".
Refresh Matrix (Ref) Button - Updates the crosspoint matrix display to indicate the active AM16/12 setup. This is
useful when the room combining function is in use, or any other function which might change the matrix crosspoint
setup.
Clear Matrix (Clr) Button - Clears all matrix crosspoints to the "Off" state.
15
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